1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4902997c72741e8989e02aac51504e5535d06f598665b8074a55846f4a4a42. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0739e6d2-a09e-40d5-a19c-193d2fa3c7ad.json and https://artists.proofprofile.net/proofs/artist/0739e6d2-a09e-40d5-a19c-193d2fa3c7ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa725c7f3885bff188aabb6cd030119e9ee3cb075e0aa468ccc26fe117f57509. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVPR0006230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe26d6c7cf4fb34e14a7843888371581e15495945f7519931dd5fcdb298666. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVPR0006233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3e6f59f65cd15a16bb9048426a16314117a72bc8741492a30cd62dc8a18931. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVPR0006238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d27357ef5507a4edcad3f7adbdcaa05263ac4c64722cc1b9c5338149ba574bf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVQU1404906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda100061f6fa4b63890a9e832010a6b50cd5a1993bc49399536d87b52bdc812a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGE2285918.
Never loose your way (Rub a dub corner riddim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3e1736d53f226e2e66eb4553ce8ba57e376cbdce47b3bf84fde242ad614f82. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITESR2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46265cd8dbc7f58866a20b64ea939d2f328c0ada1e07da883ad1022fc7901f28. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPYN2460287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3e0726fda6ebf8f678070254e9c2a4cd7b6138b6f08f5e834c3f477be75a5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKL052500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ad904a3fcfd13663d95a14dc78bc02d5e4e484e36c712b00f069aa0e805e48. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2531554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e026431daacc0d21e5b7ee32b8a759ef25c0a8d9a17aa9070a275abaf793d8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542511304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc2b8912a5103d97309d4eb840d3f863c296e47501288830dd961f046abe9b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2529209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1307c54f3e059284a18598d59200d91a126513f451142f87e0e2bff68fe0117b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USVPR0511147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb38ed61182fc12dded86497a25e47d44c80dd3b1ffadeba281d41276e6b594. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA371186068.